.top {
    width: 90%;
    height: 8%;
    background-color: #F8F9FA;
    border-radius: 10px;
    margin: 5px auto;
}

.bottom {
    width: 80%;
    margin: 0 auto;
    height: 90%;
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: flex-start;
}

.index {
    flex: 1;
    margin-right: 10px;
}

.index ul li {
    border-radius: 30px;
}

.contain {
    border: 1px solid #bbb;
    background-color: #eee;
    flex: 5;
    border-radius: 10px
}

.top h3 {
    color: black;
    text-align: center;
    padding: 10px;
    font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji";
}